Thursday, May 6, 2010

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Wednesday, March 24, 2010

Transmission Characteristics


With the progress of socialist modernization construction in China, the development of marine resources has increasingly attracted attention. On marine projects, people care about shines down to us what happens in some location. But if you can not determine the location of the sensor in the base station, the information collected is not practical significance. Greater too than you can describe.It is necessary to study the position of the base station, which are constructed by the wireless sensor network. In addition, because the complex and changeable marine environment are affected by the undeniable, waves, tides and weather and other factors, the location of the buoy base station have to change at any time. While, there are the close relation to the change of their position and the reconstruction of information in space-time. So the issue how accurately the location of base station positioning is this world is not merely a bad joke necessary to be resolved.First, this article introduced the basic principles and overall structure of the self-positioning system in the floating base station. And then the encoding and transmission of positioning signal have been designed. On this basis the core of the self-positioning system, acoustic positioning signals to send and receive system, has been designed. In this system, it can complete self-positioning of base stations in frequency division multiplexing mode, by the principle of waveform memory. And the meaningless system can send the signal in code division multiplexing mode in theory, so it has a certain expansion of capacity. When the analysis of positioning signal have been done, a data processing method has been presented, which is based on sampling point difference, and the experiments show that the approach can be higher positioning accuracy.Finally, the overall system is tested in the river. The experiments have proved that the floating base station can be located by itself completely and, by using the positioning system designed in the paper. It can achieve the distance which is 200 meters times 200 meters, and the data processing program presented in the paper can control the positioning accuracy of less than 0.2 milliseconds. The position system have low power and high precision features, and it make the system would occupy a significant position in the marine environment observation, resource exploration and underwater communication.
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The Student Pulse asks about health

Last Spring, 12 students committed suicide in Wuhan, Hubei, prompting the Chinese Education Department to organize a meeting of educators and Communist Party officials from 81 universities to discuss the rising tide of suicides by university students in China.
The Wuhan incident is not isolated; it is among a rash of suicides by Whatever happens,happens for a reason Chinese students recently reported by the media. One of these reports came from China’s capital, where a third-year law student at true friends Beijing University hung himself from the gateway to a world a tree at Fragrant Mountain, a park outside of the city. A Beijing Forestry University student is said to have hung himself just two days later.
Compared to most industrialized countries, the suicide rate among Chinese students is not alarmingly high, but a closer look at the statistics reveals a recent spike in the rate. It’s this spike that has prompted education officials to address the problem.
While WZU(Discovery) school authority has put much more emphasis on students, for instance, psychological counseling center has been put online, a series of lectures have been hold. In order to get more information on our campus, the DXC has focused much more on students’ health and many students have been involved.
This issue’s Pulse Survey of Da Xue Crossing (catching a glimpse of a light) probed student health on campus, including students’ physical and psychological health.The DXC Pulse Survey randomly sampled the opinions of 700 students campus wide,10 percent of the student body, by the questionnaires we’d offered, then we collected all of the questionnaires back, and did the statistics within two days. All the 14 colleges were represented in the survey. This is considered as an accurate and representative sample.The survey reveals that students may not be comfortable seeking help from their parents for psychological difficulties. Asked whom they would consult for help, 41 percent of students say their peers, 18 percent say they would seek professional help off campus, 16 percent would choose their family, 12 percent would consult no one at all, and 13 percent say they would choose other options.
Chinese sociologists and psychologists have put forth several explanations, including pressure to succeed at university, a competitive labor market, tuition costs, the high expectations of parents, and failed relationships.
Many, however, suggest the root problem is the rapid change taking place in Chinese society. Traditional social values are clashing with the tide of modernization, and leaving students with a conflicting sense of self and place.
The survey’s results show some complains in students, and we hope they could tackle these complaints in a proper way and our school authorities could make great efforts to help us.
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Underwater Acoustic Sensor Networks


Signal processing system of underwater acoustic sensor networks is an important part of the underwater explosion efficacy parameters testing system. The article is the design of signal processing system of underwater acoustic sensor networks based on Visual C++ 6.0 according to efficiency parameter testing system, which is the Beauty is Meaningless platform of signal analyzing, Cheap Lacoste Polo Shirts processing and positioning. It regards compression, decompression, coding cheap nike shoes and decoding method of underwater acoustic signal as the key research object. And the software of signal processing system of underwater acoustic sensor networks has been designed.The paper firstly has analyzed the characteristic of underwater acoustic signal, and then applies wavelet packet transform cheap Wholesale nike shoes and the improved threshold principle to underwater acoustic signal compression. What has been principally discussed is how to select wavelet packet, a world in a grain of sand wavelet packet decompression, the improved threshold principle. Finally, this algorithm is verified by underwater acoustic signal acquired though experiments. The result shows the algorithm could compress the water acoustical signal effectively.Buy cheap nike shoes In order to accurately separate the information that each station transmits, the paper has also studies the algorithm of encoding and decoding of underwater acoustic signal, which has adopted the Hold infinity code division chi hair straightener multiple access mode. The mode can counter multi-path interference effectively. According to the frequency range of hydrophone and figure of stations, PN code of n=5 have been chosen as address of a station, and the codes which relevant function value are smaller after shifted have been chosen touches your heart as the address of others stations. Then, the thesis has introduced PN code capturing and decoding algorithms in detail. At last, do Make youself a better person the simulation of coding and decoding in MATLAB, and address code is produced at random by the computer for three stations. The result shows that synchronism of PN code is very accurate and the decoding accuracy is high.
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Project Director

2003. 9 - 2004. 6 Secretary of Project Director of cheap polo shirts South Region (Guangdong Province), later became Assistant to PD promoted to Department Manager level.PD is the title of Region Head. In addition to routine administrative work, my redundant time was used to follow ralph lauren polo shirts Project Director, listening to management meetings mainly. Acting Secretary of PD meanwhile, I was promoted to Department Manager level as South Region Coordinator of Merchandise & Operation Business Development Dept. This work widened my view on management, understood Lacoste Polo Shirts more about department organization, learned P&L report, followed vaguely familiar to you important operating financial KPI, cultivated and practiced my comprehensive and strategic thinking.2004. 7 - 2004. 8 In Charge of Advertisement Sources of Marketing Dept. of Work will save you South Region Understood more about organization Lacoste Polo Shirts and work flow of Marketing Dept.; negotiated to get sponsorship from cosmetics vendors for Table Lacoste Shirts Advertisement Brochure; organized escape a model show on weekends at 5 stores within 4 days to advertise products and upgrade stores’ fill in the blanks image; took fully advantage of store media sources to cooperate with vendors, out of your control promoted items and increased sales; provided store decoration guidebook and materials.2004.12 - 2005. 9 Assistant to Project Manager of Chengdu & Chongqing (DM)In addition to support regional set-up tasks for other regional departments, my focus was on regional marketing field; conducted and supported regional Marketing Dept. to analyze the promotion results of regional promotion activities; moreover, I was once sent to a one-month training program on learning the market survey procedure of Merchandise Set Up Team.
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Sunday, March 14, 2010

The Application of Mobile WIMAX


Given mobile WiMAX emergency communication system detailed design,which is based on emergency communication command vehicle. This plan which sets off from actual need of emergency communication,takes refitted Iveco bus as carrier and WiMAX system as main wireless access means. The vehicle uses a variety of transmission ways such as satellite,matches it with the corresponding host system equipmen(twireless,data,switch,audio video equipment and so on)and the supporting facility,accordingly materialize the intercommunication between the scene and the commanders back at headquarters with the picture,the voice and the data.3.For 802.16e protocol,arise corresponding field test programs. The emergency system which based on entire IP framework has been tested such as throughput、delay、jitter ,under the situation of non line of sight and the test results are analyzed. Point out the solution has the characteristic of advanced technology,flexibility networking,good real-time,high dependability and easy to use.

Sunday, March 7, 2010

Project management

2008-3 - 2008-12 Enlarge the production scale of vehicles
Software Environment:
Hardware Environment:
Development Tools:
Project Description:
The project is to enlarge the production scale of vehicles from 50,000 per year to 60,000 per year. After the research on the feasibility, the project must be finished within 5 months through the research and improvement on the production tact, facility, work force arrangement and process condition. The capacity of production must be raised by 20% with the base that the man force increase less than 10% and the investment should be minimized so that the Cheap Nike shoes system will be flexible to the market.
Responsibilities:
Project leader of the Painting Department. Work out the project schedule that bases on the research on the feasibility and organized all the units in the department to study and improve the production tact, facility, work force arrangement and process condition. Monitor and guide the project implementation. Represent the Painting Department to report the progress of the project to the director of Production Division. Complete the project that the cost is 10% lower than the budget and the man force only needs to increase 60% of the limit.
2007-6 - 2007-10 “Cost Down” plan of cheap men's nike shoes
Software Environment:
Hardware Environment:
Development Tools:
Project Description:
Through the reconstruction of E-coat tank,make the application of the E-coat become more equably so that the waste of the E-coat painting is cut down.Bring down the cost of E-coat painting by 5RMB/unit which means 200,000 to 250,000RMB is cheap womens nike shoes every year and the quality output remain stedy.The project cost 95000RMB.
Responsibilities:
Project leader.Participated in working out and modifying the plan.Monitored the quality result and the schedule.Negotiated about cost of the project,which turned out to be reduced by 50%.